I just contacted Streamlight to ask if retrofit switches will be available for the current versions. I just bought two TLR-8G units, of course. Maybe removing those two screws on top at the rear will allow it.

Crap! Now I have to buy a new TLR-7!
I really like the original light, but the switch is tough for anyone with normal length fingers. I’m glad to see they have fixed it, but now I have try and off-load my gen 1 model.